qcacmn: Add config support for BTM offload

Add ini to configure BTM offload configuration
which is sent to firmware as part of RSO start
via wmi btm config cmd.

Change-Id: I69c792705b208014af8f1878f7645d957dde6c06
CRs-Fixed: 2105112

wmi_unified_priv.h

@@ -1492,6 +1492,8 @@ QDF_STATUS (*extract_ndp_end_ind)(wmi_unified_t wmi_handle,
 		uint8_t *data, struct nan_datapath_end_indication_event **ind);
 
 #endif
+QDF_STATUS (*send_btm_config)(wmi_unified_t wmi_handle,
+			      struct wmi_btm_config *params);
 };
 
 /* Forward declartion for psoc*/